Figure 29.3 Which of the following statements about common features of chordates is true? The dorsal hollow nerve cord is part of the chordate central nervous system. In vertebrate fishes, the pharyngeal slits become the gills. Humans are not chordates because humans do not have a tail. Vertebrates do not have a notochord at any point in their development; instead, they have a vertebral column.

Figure 27.6 Which of the following statements is false? Eumetazoans have specialized tissues and parazoans don’t. Lophotrochozoa and Ecdysozoa are both Bilataria. Acoela and Cnidaria both possess radial symmetry. Arthropods are more closely related to nematodes than they are to annelids.

Figure 15.24 Which of the following statements about the anatomy of a mollusk is false? a. Mollusks have a radula for scraping food. b. Mollusks have ventral nerve cords. c. The tissue beneath the shell is called the mantle. d. The mantle cavity contains hemolymph.

Which of the following is not a member of the phylum Chordata? a. Cephalochordata b. Echinodermata c. Urochordata d. Vertebrata

Which one of the following arthropods has biramous appendages?     scorpion     mite     millipede     lobster     horseshoe crab

What would be the best anatomical feature to look for to distinguish a gastropod from a chiton? (presence of muscular foot/ presence of a radula/ production of eggs/ number of shell plates)?

A radula in a gastropod is     a female reproductive structure     A sharp, tooth like structure for killing prey     a structure that aids in feeding     a sense organ for detecting light   Which choice correctly identifies the body plan of a Mollusc?     radial symmetry     bilateral symmetry     asymmetry (no symmetry)   A characteristic present in members of the arthropod subgroup that includes spiders, but not present in other arthropod classes would be the presence of     chelicerae.     an open circulatory system.     an exoskeleton.     a cuticle.     a cephalothorax.

CREATE AN ADDITION TO THE GRAPHIC. GIVEN THE FOLLOWING INFORMATION. MOLLUSKS ARE DIVIDED INTO THREE CLASSES: CLASS CEPHALOPODA (SQUIDS), CLASS GASTROPODA (SNAILS), CLASS BIVALVIA, (CLAMS AND OYSTERS) CEPHALOPODS HAVE A FEW ORDERS, ONE OF WHICH IS ORDER OCTOPODA (OCTOPUS) AND THE OTHER IS ORDER TEUTHIDA (Q THE SCIENTIFIC NAME FOR THE COMMON OCTOPUS IS OCTOPUS VULGARIS THE SCIENTIFIC NAME FOR THE COMMON SQUID IS LOLIGO VULGARIS.

Which is/are true of the mollusc radula a toothed structure is a synapomorphy of Mollusca is situated in the foregut present in bivalves         A potential disadvantage of torsion in gastropods: consumption of feces more efficient gas exchange head protection small body size